You still have legal rights to see your child. Don't let her take that from you.
When I fell pregnant, I had only been with my now hubby for only 7 months and at that point we were fighting at least once a week. When I found out I was pregnant, I gave him the option to walk away and leave me to raise the bub, which I was perfectly happy to do. Since I couldn't give him a choice on what we do about the baby ( he suggested abortion and I couldn't do that again, and I would never adopt a child out because I know too many people that were adopted that don't get over the abandonment), I gave him the choice to stay or go. He chose to stay. I told him I didn't want him to stay just for the baby, I needed to know he was still interested in me.
We fought terribly through my pregnancy as I was hormonal and I felt he wasn't preparing to be a father.
Our son was born prematurely and we were both stressed so the arguing continued, even while we were supporting each other through the grief of the dreams we had of how things would be with a new baby. It took us a bit over a year to get over that, and then my hubbys dad died. More horrible feelings led to more arguments.
On the plus side of all of that, we have always been extremely fond of each other and have a lot of common interests. We make sure we have some us time every week. Our son is the glue that holds us together in the bad times, because neither of us could imagine leaving him. When we're good though, we are awesome. We are one of those couples that people look at and say "You guys are perfect for each other. If you guys break up, there is no hope for love for any of us."
What I am trying to say is, if you guys have common ground, the baby may very well bring you together more. If it doesn't, do not be a half arsed father. Be there whenever your child needs you.
'People are never perfect but love can be. People waste time looking for the perfect lover rather than creating the perfect love' - Princess Leigh-Cheri from Still Life With Woodpecker.